
//! [0]
#include <QtWidgets>

#include "./mainwindow.h"
//! [0]
namespace widgets {

namespace scripter {
//! [1]
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent),
      textEdit(new QPlainTextEdit)
//! [1] //! [2]
{
  setCentralWidget(textEdit);

  createActions();
  createStatusBar();

  readSettings();

  connect(textEdit->document(), &QTextDocument::contentsChanged, this,
          &MainWindow::documentWasModified);

#ifndef QT_NO_SESSIONMANAGER
  QGuiApplication::setFallbackSessionManagementEnabled(false);
  connect(qApp, &QGuiApplication::commitDataRequest, this,
          &MainWindow::commitData);
#endif

  setCurrentFile(QString());
  setUnifiedTitleAndToolBarOnMac(true);
}
//! [2]

//! [3]
void MainWindow::closeEvent(QCloseEvent *event)
//! [3] //! [4]
{
  if (maybeSave()) {
    writeSettings();
    event->accept();
  } else {
    event->ignore();
  }
}
//! [4]

//! [5]
void MainWindow::newFile()
//! [5] //! [6]
{
  if (maybeSave()) {
    textEdit->clear();
    setCurrentFile(QString());
  }
}
//! [6]

//! [7]
void MainWindow::open()
//! [7] //! [8]
{
  if (maybeSave()) {
    QString fileName = QFileDialog::getOpenFileName(this);
    if (!fileName.isEmpty()) loadFile(fileName);
  }
}
//! [8]

//! [9]
bool MainWindow::save()
//! [9] //! [10]
{
  if (curFile.isEmpty()) {
    return saveAs();
  } else {
    return saveFile(curFile);
  }
}
//! [10]

//! [11]
bool MainWindow::saveAs()
//! [11] //! [12]
{
  QFileDialog dialog(this);
  dialog.setWindowModality(Qt::WindowModal);
  dialog.setAcceptMode(QFileDialog::AcceptSave);
  if (dialog.exec() != QDialog::Accepted) return false;
  return saveFile(dialog.selectedFiles().first());
}
//! [12]

//! [13]
void MainWindow::about()
//! [13] //! [14]
{
  QMessageBox::about(
      this, tr("About Application"),
      tr("The <b>Application</b> example demonstrates how to "
         "write modern GUI applications using Qt, with a menu bar, "
         "toolbars, and a status bar."));
}
//! [14]

//! [15]
void MainWindow::documentWasModified()
//! [15] //! [16]
{
  setWindowModified(textEdit->document()->isModified());
}
//! [16]

//! [17]
void MainWindow::createActions()
//! [17] //! [18]
{
  QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
  QToolBar *fileToolBar = addToolBar(tr("File"));
  const QIcon newIcon =
      QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
  QAction *newAct = new QAction(newIcon, tr("&New"), this);
  newAct->setShortcuts(QKeySequence::New);
  newAct->setStatusTip(tr("Create a new file"));
  connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
  fileMenu->addAction(newAct);
  fileToolBar->addAction(newAct);

  //! [19]
  const QIcon openIcon =
      QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
  QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
  openAct->setShortcuts(QKeySequence::Open);
  openAct->setStatusTip(tr("Open an existing file"));
  connect(openAct, &QAction::triggered, this, &MainWindow::open);
  fileMenu->addAction(openAct);
  fileToolBar->addAction(openAct);
  //! [18] //! [19]

  const QIcon saveIcon =
      QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
  QAction *saveAct = new QAction(saveIcon, tr("&Save"), this);
  saveAct->setShortcuts(QKeySequence::Save);
  saveAct->setStatusTip(tr("Save the document to disk"));
  connect(saveAct, &QAction::triggered, this, &MainWindow::save);
  fileMenu->addAction(saveAct);
  fileToolBar->addAction(saveAct);

  const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
  QAction *saveAsAct = fileMenu->addAction(saveAsIcon, tr("Save &As..."), this,
                                           &MainWindow::saveAs);
  saveAsAct->setShortcuts(QKeySequence::SaveAs);
  saveAsAct->setStatusTip(tr("Save the document under a new name"));

  //! [20]

  fileMenu->addSeparator();

  const QIcon exitIcon = QIcon::fromTheme("application-exit");
  QAction *exitAct =
      fileMenu->addAction(exitIcon, tr("E&xit"), this, &QWidget::close);
  exitAct->setShortcuts(QKeySequence::Quit);
  //! [20]
  exitAct->setStatusTip(tr("Exit the application"));

  //! [21]
  QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
  QToolBar *editToolBar = addToolBar(tr("Edit"));
//!
#ifndef QT_NO_CLIPBOARD
  const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
  QAction *cutAct = new QAction(cutIcon, tr("Cu&t"), this);
  //! [21]
  cutAct->setShortcuts(QKeySequence::Cut);
  cutAct->setStatusTip(
      tr("Cut the current selection's contents to the "
         "clipboard"));
  connect(cutAct, &QAction::triggered, textEdit, &QPlainTextEdit::cut);
  editMenu->addAction(cutAct);
  editToolBar->addAction(cutAct);

  const QIcon copyIcon =
      QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
  QAction *copyAct = new QAction(copyIcon, tr("&Copy"), this);
  copyAct->setShortcuts(QKeySequence::Copy);
  copyAct->setStatusTip(
      tr("Copy the current selection's contents to the "
         "clipboard"));
  connect(copyAct, &QAction::triggered, textEdit, &QPlainTextEdit::copy);
  editMenu->addAction(copyAct);
  editToolBar->addAction(copyAct);

  const QIcon pasteIcon =
      QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
  QAction *pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
  pasteAct->setShortcuts(QKeySequence::Paste);
  pasteAct->setStatusTip(
      tr("Paste the clipboard's contents into the current "
         "selection"));
  connect(pasteAct, &QAction::triggered, textEdit, &QPlainTextEdit::paste);
  editMenu->addAction(pasteAct);
  editToolBar->addAction(pasteAct);

  menuBar()->addSeparator();

  //------add run button-----------
  const QIcon runIcon =
      QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
  QAction *runAction = new QAction(runIcon, tr("&Run"), this);
  runAction->setShortcuts(QKeySequence::Refresh);
  runAction->setStatusTip(tr("Run The current script"));
  editMenu->addAction(runAction);
  editToolBar->addAction(runAction);
  connect(runAction, &QAction::triggered,
          [this]() { emit runScript(curFile); });

  menuBar()->addSeparator();

#endif  // !QT_NO_CLIPBOARD

  QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
  QAction *aboutAct =
      helpMenu->addAction(tr("&About"), this, &MainWindow::about);
  aboutAct->setStatusTip(tr("Show the application's About box"));

  //! [22]

  QAction *aboutQtAct =
      helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
  aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
//! [22]

//! [23]
#ifndef QT_NO_CLIPBOARD
  cutAct->setEnabled(false);
  //! [23] //! [24]
  copyAct->setEnabled(false);
  connect(textEdit, &QPlainTextEdit::copyAvailable, cutAct,
          &QAction::setEnabled);
  connect(textEdit, &QPlainTextEdit::copyAvailable, copyAct,
          &QAction::setEnabled);
#endif  // !QT_NO_CLIPBOARD
}
//! [24]

//! [32]
void MainWindow::createStatusBar()
//! [32] //! [33]
{
  statusBar()->showMessage(tr("Ready"));
}
//! [33]

//! [34] //! [35]
void MainWindow::readSettings()
//! [34] //! [36]
{
  QSettings settings(QCoreApplication::organizationName(),
                     QCoreApplication::applicationName());
  const QByteArray geometry =
      settings.value("geometry", QByteArray()).toByteArray();
  if (geometry.isEmpty()) {
    const QRect availableGeometry =
        QApplication::desktop()->availableGeometry(this);
    resize(availableGeometry.width() / 3, availableGeometry.height() / 2);
    move((availableGeometry.width() - width()) / 2,
         (availableGeometry.height() - height()) / 2);
  } else {
    restoreGeometry(geometry);
  }
}
//! [35] //! [36]

//! [37] //! [38]
void MainWindow::writeSettings()
//! [37] //! [39]
{
  QSettings settings(QCoreApplication::organizationName(),
                     QCoreApplication::applicationName());
  settings.setValue("geometry", saveGeometry());
}
//! [38] //! [39]

//! [40]
bool MainWindow::maybeSave()
//! [40] //! [41]
{
  if (!textEdit->document()->isModified()) return true;
  const QMessageBox::StandardButton ret = QMessageBox::warning(
      this, tr("Application"),
      tr("The document has been modified.\n"
         "Do you want to save your changes?"),
      QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
  switch (ret) {
    case QMessageBox::Save:
      return save();
    case QMessageBox::Cancel:
      return false;
    default:
      break;
  }
  return true;
}
//! [41]

//! [42]
void MainWindow::loadFile(const QString &fileName)
//! [42] //! [43]
{
  QFile file(fileName);
  if (!file.open(QFile::ReadOnly | QFile::Text)) {
    QMessageBox::warning(
        this, tr("Application"),
        tr("Cannot read file %1:\n%2.")
            .arg(QDir::toNativeSeparators(fileName), file.errorString()));
    return;
  }

  QTextStream in(&file);
#ifndef QT_NO_CURSOR
  QGuiApplication::setOverrideCursor(Qt::WaitCursor);
#endif
  textEdit->setPlainText(in.readAll());
#ifndef QT_NO_CURSOR
  QGuiApplication::restoreOverrideCursor();
#endif

  setCurrentFile(fileName);
  statusBar()->showMessage(tr("File loaded"), 2000);
}
//! [43]

//! [44]
bool MainWindow::saveFile(const QString &fileName)
//! [44] //! [45]
{
  QFile file(fileName);
  if (!file.open(QFile::WriteOnly | QFile::Text)) {
    QMessageBox::warning(
        this, tr("Application"),
        tr("Cannot write file %1:\n%2.")
            .arg(QDir::toNativeSeparators(fileName), file.errorString()));
    return false;
  }

  QTextStream out(&file);
#ifndef QT_NO_CURSOR
  QGuiApplication::setOverrideCursor(Qt::WaitCursor);
#endif
  out << textEdit->toPlainText();
#ifndef QT_NO_CURSOR
  QGuiApplication::restoreOverrideCursor();
#endif

  setCurrentFile(fileName);
  statusBar()->showMessage(tr("File saved"), 2000);
  return true;
}
//! [45]

//! [46]
void MainWindow::setCurrentFile(const QString &fileName)
//! [46] //! [47]
{
  curFile = fileName;
  textEdit->document()->setModified(false);
  setWindowModified(false);

  QString shownName = curFile;
  if (curFile.isEmpty()) shownName = "untitled.txt";
  setWindowFilePath(shownName);
  emit currFileChanged(curFile);
}
//! [47]

//! [48]
QString MainWindow::strippedName(const QString &fullFileName)
//! [48] //! [49]
{
  return QFileInfo(fullFileName).fileName();
}
//! [49]
#ifndef QT_NO_SESSIONMANAGER
void MainWindow::commitData(QSessionManager &manager) {
  if (manager.allowsInteraction()) {
    if (!maybeSave()) manager.cancel();
  } else {
    // Non-interactive: save without asking
    if (textEdit->document()->isModified()) save();
  }
}
#endif
}  // namespace scripter
}  // namespace widgets
